Color

#5778ff

#5778ff
hex#5778ff
rgbrgb(87, 120, 255)
hslhsl(228, 100%, 67%)
oklchoklch(0.621 0.203 269.3)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2268

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#ffdd57

#57cdff · #8957ff

#ff5778 · #78ff57

Split-complementary

Open in tool →

#ff8957 · #cdff57

#ff57cd · #ffdd57 · #57ff89

Contrast

#5778ff as textRatioAAAA largeAAAFix
Aaon white
3.79:1failpassfail
  • AA: use #4268ff as the text (4.51:1)
  • AAA: use #0537ff as the text (7.01:1)
  • AA: or shift the background to #1a1a1a (4.59:1)
Aaon black
5.54:1passpassfail
  • AAA: use #7591ff as the text (7.25:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5778ff as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#5778ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5778ff
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #5778ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5778ff-9c9fc4-df7c4e-231f2d-e9eff1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md